netdev - Re: SO_REUSEPORT - can it be done in kernel?

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Message-ID: <20110301131823.GB8028@gondor.apana.org.au>
Date:	Tue, 1 Mar 2011 21:18:23 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Thomas Graf <tgraf@...radead.org>,
	David Miller <davem@...emloft.net>, rick.jones2@...com,
	therbert@...gle.com, wsommerfeld@...gle.com,
	daniel.baluta@...il.com, netdev@...r.kernel.org
Subject: Re: SO_REUSEPORT - can it be done in kernel?

On Tue, Mar 01, 2011 at 02:03:29PM +0100, Eric Dumazet wrote:
>
> I believe its now done properly (in net-next-2.6) with commit
> 4f57c087de9b46182 (net: implement mechanism for HW based QOS)

Nope, that has nothing to do with this.

> > The odd packet reordering each time your scheduler decides to
> > migrate the process isn't a big deal IMHO.  If your scheduler
> > is constantly moving things you've got bigger problems to worry
> > about.
> 
> Well, BENET has one TX queue anyway...

Interesting.  So I wonder which lock is showing up at the top
of the profile with a single socket then.  As it's definitely
going away with multiple sockets, that means it's not the TX
queue lock.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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